Playback Loop not working in Cut or Edit 17.1B10 Studio

Playback loop is not working in Cut or Edit page but is looping on clip or from in- to out- point in Color.
17.1B10 Studio Windows
17.1B10 Studio Windows
https://forum.blackmagicdesign.com/
https://forum.blackmagicdesign.com/viewtopic.php?f=21&t=135860